From patchwork Fri May 3 12:43:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 10928701 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7FD4115A6 for ; Fri, 3 May 2019 12:58:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6E99C285BD for ; Fri, 3 May 2019 12:58:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 631D6285C7; Fri, 3 May 2019 12:58:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0F21A285BD for ; Fri, 3 May 2019 12:58:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2p271//O7ojQAiKlfQAxEpaLTEbQ53zKN8skjyJYCCg=; b=Uhd0f/4yTA5Uqf 8kLcJNXtTCg0t03+j4LAtrhRWqo13wdKoj6e+ecjGCXFYjDdJuRSMYytxv5OtyF0iAtHyzJ1uk1kN ZAG3rhEZvmhg8kfe0Iw9InvxQ5kgwI0maCNn5lYd7XjTEleqmwSPK3mvgI4IB9S08Tw6aU7JwmJr0 OIPIsmqutAUJVbrFwtTsXJIeYTQFMEBmQq/VHSp8TY1DdcY1x50GSG+H8Zs1bxSife3labw3sIkwj cUnLsrt370306sHpKpIQieoHHhVCf7ilJ4B3OIrGlL2f+VZa1rl0qHuNRLAAAGJMh83uWho20H46J wg7EX0Zw8SrInCd2nQIQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hMXm2-00070P-GK; Fri, 03 May 2019 12:58:46 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hMXZu-0005Oc-Iv for linux-arm-kernel@lists.infradead.org; Fri, 03 May 2019 12:46:44 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2801D169E; Fri, 3 May 2019 05:46:14 -0700 (PDT) Received: from filthy-habits.cambridge.arm.com (filthy-habits.cambridge.arm.com [10.1.197.61]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E53323F220; Fri, 3 May 2019 05:46:10 -0700 (PDT) From: Marc Zyngier To: Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Subject: [PATCH 26/56] KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG Date: Fri, 3 May 2019 13:43:57 +0100 Message-Id: <20190503124427.190206-27-marc.zyngier@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190503124427.190206-1-marc.zyngier@arm.com> References: <20190503124427.190206-1-marc.zyngier@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190503_054615_271924_FA16003A X-CRM114-Status: GOOD ( 11.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peter Maydell , Andrew Jones , kvm@vger.kernel.org, Julien Thierry , Suzuki K Poulose , Will Deacon , Christoffer Dall , Kristina Martsenko , "zhang . lei" , Julien Grall , kvmarm@lists.cs.columbia.edu, Amit Daniel Kachhap , Andrew Murray , =?utf-8?q?Alex_Benn=C3=A9e?= , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dave Martin KVM_GET_ONE_REG and KVM_SET_ONE_REG return some error codes that are not documented (but hopefully not surprising either). To give an indication of what these may mean, this patch adds brief documentation. Signed-off-by: Dave Martin Signed-off-by: Marc Zyngier --- Documentation/virtual/kvm/api.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 2d4f7ce5e967..cd920dd1195c 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1871,6 +1871,9 @@ Architectures: all Type: vcpu ioctl Parameters: struct kvm_one_reg (in) Returns: 0 on success, negative value on failure +Errors: +  ENOENT:   no such register +  EINVAL:   other errors, such as bad size encoding for a known register struct kvm_one_reg { __u64 id; @@ -2192,6 +2195,9 @@ Architectures: all Type: vcpu ioctl Parameters: struct kvm_one_reg (in and out) Returns: 0 on success, negative value on failure +Errors: +  ENOENT:   no such register +  EINVAL:   other errors, such as bad size encoding for a known register This ioctl allows to receive the value of a single register implemented in a vcpu. The register to read is indicated by the "id" field of the